To the Devs,You need to have the game NOT start in CO-OP mode. Here is the reasons why:

1.) Some people do not want other people just randomly jumping into their game. Some people are not social.

2.) Some people(like I at first) did not know you had to turn CO-OP off first before they started playing to make it so others couldn't randomly join the game. Makes you jumpy at playing, "Did I forget to turn off the CO-OP". I would think you would want the player to be thinking of the gameplay.

3.) Some people are just not 'Nice' people. To allow them to be able to jump into other(the people from 1-2) games is a BAD idea. Some people will join others and take ALL they can carry from the main ship(sorry terrible with names. It's the big ship you go to, to use the map to warp to other areas) and then they leave. That player loosing quite a bit of work.

For the MMO I fully agree with you.....and when that comes out you will hear no complaints from me, as I have already pre-ordered the MMO. For the Single-Player I should not have to worry whether or not I have turned off CO-OP mode so no one will come in and just take my stuff that I have spent hours on. If I wanted to play a CO-OP game where your fellow human players can take from you, hours of work in game. I would be playing a game like DayZ(good game, terrible people).